remove conference from my assignments

app/views/assignments/by_user.html.erb

@@ -3,7 +3,6 @@
   <table class="border *:border">
     <thead>
       <tr class="*:font-bold *:border">
-        <th>Conference</th>
         <th>Date</th>
         <th>Time</th>
         <th>Stage</th>
@@ -14,7 +13,6 @@
     <tbody>
   <% @user.assignments.includes(:session, session: :conference).order('sessions.starts_at').each do |assignment| %>
     <tr class="*:border *:p-1 <%= assignment.session.starts_at < Time.now ? "past" : "future" %>">
-      <td><%= assignment.session.conference.name %></td>
       <td><%= assignment.session.starts_at.strftime('%Y-%m-%d') %></td>
       <td><%= assignment.session.starts_at.strftime('%H:%M') %></td>
       <td><%= assignment.session.stage.name %></td>